2 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org>
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32 #ifndef _BHND_CORES_PCI_BHND_PCI_HOSTBVAR_H_
33 #define _BHND_CORES_PCI_BHND_PCI_HOSTBVAR_H_
36 * PCI/PCIe-Gen1 Host Bridge definitions.
39 #include <sys/param.h>
42 #include "bhnd_pcivar.h"
44 DECLARE_CLASS(bhnd_pci_hostb_driver);
47 * PCI/PCIe-Gen1 endpoint-mode device quirks
51 BHND_PCI_QUIRK_NONE = 0,
54 * SBTOPCI_PREF and SBTOPCI_BURST must be set on the
55 * SSB_PCICORE_SBTOPCI2 register.
57 BHND_PCI_QUIRK_SBTOPCI2_PREF_BURST = (1<<1),
60 * SBTOPCI_RC_READMULTI must be set on the SSB_PCICORE_SBTOPCI2
63 BHND_PCI_QUIRK_SBTOPCI2_READMULTI = (1<<2),
66 * PCI CLKRUN# should be disabled on attach (via CLKRUN_DSBL).
68 * The purpose of this work-around is unclear; there is some
69 * documentation regarding earlier Broadcom drivers supporting
70 * a "force CLKRUN#" *enable* registry key for use on mobile
73 BHND_PCI_QUIRK_CLKRUN_DSBL = (1<<3),
76 * On PCI-attached BCM4321CB* boards, the PCI latency timer must be set
77 * to 960ns on initial attach.
79 BHND_PCI_QUIRK_960NS_LATTIM_OVR = (1<<4),
82 * TLP workaround for unmatched address handling is required.
84 * This TLP workaround will enable setting of the PCIe UR status bit
85 * on memory access to an unmatched address.
87 BHND_PCIE_QUIRK_UR_STATUS_FIX = (1<<5),
90 * PCI-PM power management must be explicitly enabled via
91 * the data link control register.
93 BHND_PCIE_QUIRK_PCIPM_REQEN = (1<<6),
96 * Fix L0s to L0 exit transition on SerDes <= rev9 devices.
98 * On these devices, PCIe/SerDes symbol lock can be lost if the
99 * reference clock has not fully stabilized during the L0s to L0
100 * exit transition, triggering an internal reset of the chip.
102 * The SerDes RX CDR phase lock timers and proportional/integral
103 * filters must be tweaked to ensure the CDR has fully stabilized
104 * before asserting receive sequencer completion.
106 BHND_PCIE_QUIRK_SDR9_L0s_HANG = (1<<7),
109 * The idle time for entering L1 low-power state must be
110 * explicitly set (to 114ns) to fix slow L1->L0 transition issues.
112 BHND_PCIE_QUIRK_L1_IDLE_THRESH = (1<<8),
115 * The ASPM L1 entry timer should be extended for better performance,
116 * and restored for better power savings.
118 BHND_PCIE_QUIRK_L1_TIMER_PERF = (1<<9),
121 * ASPM and ECPM settings must be overridden manually.
122 * Applies to 4311B0/4321B1 chipset revisions.
124 * The override behavior is controlled by the BHND_BFL2_PCIEWAR_OVR
125 * flag; if set, ASPM and CLKREQ should be explicitly disabled. If not
126 * set, they should be explicitly enabled.
129 * - Update SRSH_ASPM_ENB flag in the SPROM ASPM register.
130 * - Update SRSH_CLKREQ_ENB flag in the SPROM CLKREQ_REV5
132 * - Update ASPM L0S/L1 flags in PCIER_LINK_CTL register.
133 * - Clear CLKREQ (ECPM) flag in PCIER_LINK_CTL register.
136 * - Clear ASPM L1 flag in the PCIER_LINK_CTL register.
137 * - Set CLKREQ (ECPM) flag in the PCIER_LINK_CTL register.
140 * - Set CLKREQ (ECPM) flag in the PCIER_LINK_CTL register.
142 BHND_PCIE_QUIRK_ASPM_OVR = (1<<10),
145 * A subset of Apple devices did not set the BHND_BFL2_PCIEWAR_OVR
146 * flag in SPROM; on these devices, the BHND_BFL2_PCIEWAR_OVR flag
147 * should always be treated as if set.
149 BHND_PCIE_QUIRK_BFL2_PCIEWAR_EN = (1<<11),
152 * Fix SerDes polarity on SerDes <= rev9 devices.
154 * The SerDes polarity must be saved at device attachment, and
155 * restored on suspend/resume.
157 BHND_PCIE_QUIRK_SDR9_POLARITY = (1<<12),
160 * SerDes PLL down flag must be manually disabled (by ChipCommon) on
163 BHND_PCIE_QUIRK_SERDES_NOPLLDOWN = (1<<13),
166 * On attach and resume, consult the SPROM to determine whether
167 * the L2/L3-Ready w/o PCI RESET work-around must be applied.
169 * If L23READY_EXIT_NOPRST is not already set in the SPROM, set it
171 BHND_PCIE_QUIRK_SPROM_L23_PCI_RESET = (1<<14),
174 * The PCIe SerDes PLL must be configured to not retry the startup
175 * sequence upon frequency detection failure on SerDes <= rev9 devices
177 * The issue this workaround resolves is unknown.
179 BHND_PCIE_QUIRK_SDR9_NO_FREQRETRY = (1<<15),
182 * Common flag for quirks that require PCIe SerDes TX
183 * drive strength adjustment.
185 * Only applies to PCIe >= rev10 devices.
187 BHND_PCIE_QUIRK_SERDES_TXDRV_ADJUST = (1<<16),
190 * On Apple BCM94322X9 devices, the PCIe SerDes TX drive strength
191 * should be set to 700mV.
193 * The exact issue is unknown, but presumably this workaround
194 * resolves signal integrity issues with these devices.
196 * Only applies to PCIe >= rev10 devices.
198 BHND_PCIE_QUIRK_SERDES_TXDRV_700MV = (1<<17) |
199 BHND_PCIE_QUIRK_SERDES_TXDRV_ADJUST,
202 * On some Apple BCM4331-based devices, the PCIe SerDes TX drive
203 * strength should be set to its maximum.
205 * The exact issue is unknown, but presumably this workaround
206 * resolves signal integrity issues with these devices.
208 BHND_PCIE_QUIRK_SERDES_TXDRV_MAX = (1<<18) |
209 BHND_PCIE_QUIRK_SERDES_TXDRV_ADJUST,
212 * PCIe cores prior to rev18 do not support an MRRS larger than
215 BHND_PCIE_QUIRK_MAX_MRRS_128 = (1<<19),
218 * The PCIe core should be configured with an MRRS of 512 bytes.
220 BHND_PCIE_QUIRK_DEFAULT_MRRS_512 = (1<<20),
224 * bhnd_pci_hostb driver instance state.
226 struct bhnd_pcihb_softc {
227 struct bhnd_pci_softc common; /**< common bhnd_pci state */
229 device_t pci_dev; /**< host PCI device */
230 uint32_t quirks; /**< hostb device quirks */
232 /** BHND_PCIE_QUIRK_ASPM_OVR state. */
235 * ASPM/CLKREQ override setting.
237 * If true, ASPM/CLKREQ should be overridden as enabled.
238 * If false, ASPM/CLKREQ should be overridden as disabled.
241 } aspm_quirk_override;
243 /** BHND_PCIE_QUIRK_SDR9_POLARITY state. */
246 * PCIe SerDes RX polarity.
248 * Initialized to the PCIe link's RX polarity
249 * at attach time. This is used to restore the
250 * correct polarity on resume */
252 } sdr9_quirk_polarity;
256 #endif /* _BHND_CORES_PCI_BHND_PCI_HOSTBVAR_H_ */